package cn.ligui.exportsis.utils;

import com.google.gson.Gson;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.NameValuePair;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.io.IOException;
import java.net.SocketTimeoutException;
import java.net.URI;
import java.security.cert.X509Certificate;
import java.time.LocalDateTime;
import java.time.temporal.ChronoUnit;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * @Author: ligui
 * @CreateTime: 2021-12-07 11:14
 * @Description: httpclient工具类
 */
@Slf4j
public class HttpClientUtil {

    /**
     * 带参数的get请求
     *
     * @param url
     * @param param
     * @return String
     */
    public static String doGet(String url, Map<String, String> param) {
        Gson gson = new Gson();

        try {
            Thread.sleep(200); // 延迟200ms
        } catch (InterruptedException e) {
            log.error(e.getMessage());
        }
        // 创建Httpclient对象
        CloseableHttpClient httpClient = wrapClient();
        String resultString = "";
        CloseableHttpResponse response = null;
        try {
            // 创建uri
            URIBuilder builder = new URIBuilder(url);
            if (param != null) {
                for (String key : param.keySet()) {
                    builder.addParameter(key, param.get(key));
                }
            }
            URI uri = builder.build();
            // 创建http GET请求
            HttpGet httpGet = new HttpGet(uri);
            RequestConfig requestConfig = RequestConfig.custom()
//                    .setSocketTimeout(1000)
                    .build();
            httpGet.setConfig(requestConfig);
            LocalDateTime begin = LocalDateTime.now();
            log.info("interface begin---->url:" + url + ",param:" + gson.toJson(param));
            // 执行请求
            response = httpClient.execute(httpGet);
            LocalDateTime end = LocalDateTime.now();
            long secondsBetween = ChronoUnit.SECONDS.between(begin, end);
            log.info("interface end,cost: " + secondsBetween + " s");
            // 判断返回状态是否为200
            if (response.getStatusLine().getStatusCode() == 200) {
                resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
            }
        } catch (SocketTimeoutException e) {
            log.error("SIS3 error tag:--->" + url);
        } catch (Exception e) {
            log.error(e.getMessage());
        }  finally {
            try {
                if (response != null) {
                    response.close();
                }
                httpClient.close();
            } catch (IOException e) {
                log.error(e.getMessage());
            }
        }
        return resultString;
    }

    /**
     * 不带参数的get请求
     *
     * @param url
     * @return String
     */
    public static String doGet(String url) {
        return doGet(url, null);
    }

    /**
     * 带参数的post请求
     *
     * @param url
     * @param param
     * @return String
     */
    public static String doPost(String url, Map<String, String> param) {
        // 创建Httpclient对象
        CloseableHttpClient httpClient = wrapClient();
        CloseableHttpResponse response = null;
        String resultString = "";
        try {
            // 创建Http Post请求
            HttpPost httpPost = new HttpPost(url);
            // 创建参数列表
            if (param != null) {
                List<NameValuePair> paramList = new ArrayList<>();
                for (String key : param.keySet()) {
                    paramList.add(new BasicNameValuePair(key, param.get(key)));
                }
                // 模拟表单
                UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList);
                httpPost.setEntity(entity);
            }
            // 执行http请求
            response = httpClient.execute(httpPost);
            resultString = EntityUtils.toString(response.getEntity(), "utf-8");
        } catch (SocketTimeoutException e) {
            log.error("SIS3 error tag:--->" + url);
        } catch (Exception e) {
            log.error(e.getMessage());
        } finally {
            try {
                if (response != null) {
                    response.close();
                }
            } catch (IOException e) {
                log.error(e.getMessage());
            }
        }
        return resultString;
    }

    /**
     * 不带参数的post请求
     *
     * @param url
     * @return String
     */
    public static String doPost(String url) {
        return doPost(url, null);
    }

    /**
     * 传送json类型的post请求
     *
     * @param url
     * @param json
     * @return String
     */
    public static String doPostJson(String url, String json, ContentType contentType) throws Exception {
        // 创建Httpclient对象
        CloseableHttpClient httpClient = wrapClient();
        CloseableHttpResponse response;
        String resultString;

        // 创建Http Post请求
        HttpPost httpPost = new HttpPost(url);

        //设置超时时间
        RequestConfig requestConfig = RequestConfig.custom()
//                .setConnectTimeout(20000).setSocketTimeout(20000)
                .build();
        httpPost.setConfig(requestConfig);
        // 创建请求内容
//            StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);
        StringEntity entity = new StringEntity(json, contentType);
        httpPost.setEntity(entity);
        // 执行http请求
        response = httpClient.execute(httpPost);
        resultString = EntityUtils.toString(response.getEntity(), "utf-8");
        response.close();

        return resultString;
    }

    //绕过ssl证书验证
    public static CloseableHttpClient wrapClient() {
        try {
            SSLContext ctx = SSLContext.getInstance("TLS");
            X509TrustManager trustManager = new X509TrustManager() {
                public X509Certificate[] getAcceptedIssuers() {
                    return null;
                }

                public void checkClientTrusted(X509Certificate[] arg0, String arg1) {
                }

                public void checkServerTrusted(X509Certificate[] arg0, String arg1) {
                }
            };
            ctx.init(null, new TrustManager[]{trustManager}, null);
            SSLConnectionSocketFactory ssf = new SSLConnectionSocketFactory(ctx, NoopHostnameVerifier.INSTANCE);
            return HttpClients.custom()
                    .setSSLSocketFactory(ssf)
                    .build();
        } catch (Exception e) {
            return HttpClients.createDefault();
        }
    }
}
